Engraving apparatus



June 20, 1939a J 300 2,163,271

smemvme APPARATUS -Filed Aug. 15, 1938 5 Sheets-Sheet. l

I INVENTOR EVERETT J. COOK A TTORNE Y June 20, 1 939.

5 Sheet-Sheet 2 Filed Aug. 15. 1938 v W mm um wm Y &W 8 8 s nm 3 Q S m-.5 um I 0 n mm 0 bn m m mm 8 3 Q ow 3 mm 3 mm A 3 mm. 2 mm vw mm. mm .5m o. 9

I NVENTOR E ERETT J 620K ATTORNEY. f

June 2 1939- E. J. cooK ENGRAVING APPARATUS Filed Aug. 15 1938 5Sheets-Sheet 3 INVENTOR EVERETT J FIG; 9.

ATTORNEYS June 20, 1939'.

E. J. COOK Eusmvme APPARATUS Filed Aug. 15, .1938

5 Sheets-Sheet 4 INVENTOR EVERETT J.

ATTORNEY June 20-, 1939. E. J. cooK ENGRAVING -APPARATUS ,Filed Aug. 15,1938 5 Sheets-Sheet 5 INVENTOR EVERETT J. COOK ATTORNEY Patented June20, 1939 UNITED STATES- PATENT v orries nNGnAvmG APPARATUS Everett J.Cook, Toledo, Ohio, assignor to H. H. I

Buggie a Company,- Toledo, Ohio, at corpora-,

tion of Ohio Application August 15, 1938, Serial No. 224,986

27 Claims. o1. 51-100) This invention relates generally to engravingmachines and refers more particularly to improvements in engravingapparatus of the type set forth in my copending application Serialv 5No. 165,382, filed September 23, 1937.

It is one of the'principal objects of this invention to provide improvedmeans responsive to changes in contour of the surface of the article tobe engraved toeiiect the relative movement 10- of the article andengraving tool required to maintain the same relationship between thearticle and tool, irrespective of variations in the contour of thesurface of the article traversed by the tool. The above arrangement isparticularly 1, advantageous when engraving articles having contoured orirregular surfaces, since it offersthe possibility of providing anengraving of uniform depth in these surfaces, irrespective ofirregularities or changes in shape of the latter.

- Another advantageous feature of this inven-- 90 Still another objectof this invention resides in the provision of an engraving machinewherein the article is normally .yieldably urged into engagement with anabutment positioned adjacent the engraving tool and wherein the articleis -35 fulcrumed about the abutment either toward or away from the tool,depending upon the-contour of the surface of the article traversed bythe tool.

A further feature of the present invention consists in the provision ofan engraving machine of '0 the character set forth above having apattern corresponding in shape to the article to be engraved and havingmeans operated by the surface of the pattern for effecting the relativemovement of the article and tool required to maintain the 45 samerelationship between the latter, irrespective of variations in the shapeof the article.

Still another object of the invention resides in the provision of anengraving machine wherein the pattern moves as a unit with the articleand 50 wherein the mechanism for moving thearticle relative to the toolis controlled by a follower engageable with the pattemsurface at a pointcorresponding to the point of engagement of the engraving tool with thearticle. j

In addition to the foregoing, the present invention contemplatesimproved means for effecting relative movement between the article andtool in a manner that the tool traverses the surface of the article tobe engraved.

The foregoing, as well as other objects, will be- 5 made more apparentas this description proceeds,

especially when considered in connection with the accompanying drawings,wherein:-

' Figure 1 is a front elevational view, partly in section, of anengraving machine constructed in accordance with this invention; t

Figure 2 is a fragmentary plan view of the machine shown in Figure 1having certain parts broken away for the sake of clearness;

Figure 3 is an enlarged vertical sectional view taken substantially onthe plane indicated by the line 33 of Figure l;

Figure 4 is an end elevational view of the machine having certain partsbroken away for the sake of clearness; I Figure 5 is a sectional viewtaken substantially on the plane indicated by the line 5-5 of Figure 1;v

, Figure 6 is an enlarged elevational view showing two differentpositions of the article during the engraving operation;

Figure 7 is a top plan view of the article feeding machine havingcertain parts broken away for the sake of clearness;

Figure8 is a sectional view taken substantially a0 on the planeindicated by the line 8 8 of Figure 7;

Figure 9 is a diagram of the electrical circuit for controlling the workcarriage;

Figure 10 is a section on the line lll -|0 of Figure 3;

Figure 11 is a semi-diagrammatic view illustrating a slightly modifiedform of-con structiont Although it will be understood as this descrip-,tion proceeds that my improved engraving ap- 4o paratus may beadvantageously employed to engrave various different types of articles,nevertheless, for the purpose of illustration, I have shown an engravingmachine especially designed to engrave glassware, such as tumblers andthe like. It will also be understood as this description pro- .ceedsthat while the machine selected herein for Tool supporting means In thepresent instance, the tools B for each pair of adjacent tumblers A aresecured to the opposite ends of a shaft l5 and the latter, in turn,constitutes the drive shaft of a suitable high-speed electric motor Hi.In other words, an electric motor i6 having a double-ended drive shaftis provided for each pair of tumblers A and a tool B is secured to eachend of the drive" shaft opposite the surfaces of the tumblers to beengraved. Upon reference to Figure 3, it will be noted that the motorsare secured to the oscillating beam C by means of brackets l1 and aremovable by the beam in directions toward and away from theglass'tumblers. This construction provides a direct drive for the toolsand is advantageous in that it not only insures more effective operationof the tools but, in addition, offers the possibility of eliminating theusual complicated arrangement of belts or similar driving connections.

Upon reference to Figure 5, it will be noted that the beam 0 issupported adjacent its longitudinal edges on bars [8 having the oppositeedges Vshaped and'respectively engaging correspo'ndingly shaped groovesi9 in the bottom surface of the beam 0 and adjacent portions of themachine frame. As pointed out in my copending application Serial No.165,382, the construction is such as to reduce the friction offered tooscillation of the beam to a minimum and at the same time provide astable support for the beam. It will be observed from Figure 1 that thestability of the beam C is-further insured by suspending weights 2!!from the beam through the medium of chains 2|. The arrangement is suchthat the action of the beam is stabilized without increasing the'inertiaof the latter, and this is desirable in that it minimizes the powernecessary for oscillating the beam.

Tool operating mechanism In the interests of simplicity, the mechanismselected herein for oscillating the beam C and tools B connected theretois the same as the mechanism described in detail in my copendingapplication Serial No. 165,382, flIed September 23, 1937. Brieflydescribed, however, the beam C is moved in a direction to engage thetools B with the articles of glassware A by means of an electromagnet Dand is moved in the opposite direction by means of a spring E. In otherwords, when the electrom g et D is energized, the beam 0 is moved towardthe front side of the machine to cause the tools B to move intoengagement with the articles of glassware A, and when the electromagnetis de-energlzed, the spring E moves the beam 0 in the opposite directionto cause the tools B to travel away from the articles of glassware A.Upon reference to Figure 5, it will be noted that the electromagnet D isshown as having a magnetic field 22 and a load coil 23 secured to aplunger 24 which, in turn, is mounted in the core 25 of theelectromagnetfor sliding movement into and out of the field 22. Thearrangement is such that movement of the load coil 23 into the field 22against theaction of the spring E' effects a movement of the toolcarrying beam C in a direction toward the glass tumblers A, through anoperative connection 26 between the plunger 24 and the outer edge of thebeam C. In general, the operative connection includes a lever 21 118V,-ing thelower end connected to the plunger 24 and having the upper endfulcrumed on a tapered adjustable pin 29. Also, the connection 26includes a second lever 29 having the lower end pivotally connectedbetween the fulcrum 26- and the plunger 24 by means of a link 39. The

upper end of the second lever29 is provided with a hooked portion 3|having a V-shaped projection 32 fulcrumed in a correspondingly shapedgroove 33 formed in a member 34 which is fixed to the machine frame. Astud 35 is secured to the lever 29 intermediate the ends of the latterand is, provided at its forward end with a conical portion 36 adapted tocontact an adjustable insert 31 secured to the beam C at the'rear sideof the latter intermediate the ends of the same. The adjustable insert31 is maintained into engagement with the forward end of the stud 36 bymeans of the springs 38 having the forward ends secured to the beam Cand having the rear ends secured to the machine frame through the mediumof adjustable'studs 39.

With the above construction, it will benoted that when the load coil 23is energized, the

plunger 24, together with the coil, is moved ina direction toward theglass tumblers A into the .field 22. .The lower end of the lever 21 iscorrespondingly moved in the same direction about its fulcrum 28 and thelever 29 is moved by the lever 21 in a forward direction about itsfulcrum 33. As a result, the beam. 0 is moved in Tool control means -Ingeneral, the operation of the electromagnet D is controlled inaccordance with the design or recordit is desired to reproduce on theglass tumblers A and, in the present instance, the.

record or design is carried by a revoluble drum F, shown in Figure 5 assupported at one end of the machine. In the present instance, the

characters or'record applied to the drum F areshaded and are scanned bymeans of an optical unit G supported opposite the drum F. Upon referenceto Figure 5, it will be noted that the optical unit G comprisesprincipally a projector H and a pair of photoelectric cells I. Theprojector H has a source of illumination in the form of an electriclight bulb J adjustably supported at the rear end of the lens barrel Kand is also provided with condenser'lenses L for directing the lightthrough the aperture M formed in a disc supported in the barrel K at thefront side of the lenses L. The light passing through the aperture M isfocused by the objective lenses N on the surface of the drum F uponwhich the record or pattern is applied. It will be understood from theforegoing that the light projected by the lenses N is in the form of abeam having an extremely small area on the surface of the record, andthe light reflected from the surface of the record is intercepted by thephotoelectric cells I supported on the optical unit 6 at opposite sidesof the front end of the lens barrel K. 'The photoelectric cells I arerendered conductive when the beam of light from the projector interceptsa light portion of the reco'r'd or design on the drum 1" and 'arerendered nonconductive when the beam of light intercepts a dark portionof the record. when thephotoelectric cells are conducting, an electronfiow is effected from the cathodes of the cells to the anodes of thelatter in proportion to the intensity of light reflected from the recordand the resulting flow of current through the photoelectric cells isamplified by an amplifier, designated generally in the drawings by thereference character O. The particular amplifier 0 employed is preferablyidentical to the one described in detail in my above identifiedcopending application and, since this amplifier forms no part of thepresent invention, it is not shown or described in detail. It willsufi'lce to point out that the last stage of the amplifier circuit isrendered non-conductive when the beam of prothe illuminated portions ofthe record. On the other hand, when the beam of projected lightintercepts the darker portions of the record on the drum F, the laststage of the amplifier is rendered conductive and, as a result, arelatively high current flows through the plate circuit sufiicient toenergize the electr'omagnet D and move the tools B toward the glasstumblers A. It will, of course, be understood that the amplifier may bedesigned to provide the opposite effect without departing from thespirit and scope of this invention. This may be readily accomplished inthe manner set forth in the Thorpe application Serial No. 146,943, filedJune',7, 1937, so that the tools B move into engagement with theworkwhen the light sensitive cell is rendered conductive and more outofengagement with the work when the cell is rendered non-conductive.

Supporting means for record and glassware A Upon reference to Figures 3,4, 5 and 6, it will be noted that the articles of glassware A to beengraved and the drum F, carrying the design or characters to bereproduced, are mounted upon a carriage 40 which, in turn, is mountedfor vertical sliding movement on a' column, 4] of the machine frame. Themanner in which the carriage is fed vertically will be more fullyhereinafter set forth and itv will sufiice to bring out at this timethat the purpose of the vertical feed ing of the carriage is, of course,to bring different portions of the record carrying drum F and glasstumblers A throughout, the length thereof into registration respectivelywith the optical unit G and tools B. Also, of'course, the recordcarrying drum .Fand articles of glassware A are rotated during verticaltravelof the carriage so that the entire record on the drum F is scannedby the optical unit G and reproduced on the articles of glassware A bythe tools B.

Upon reference to Figure 5, it will be noted that V the record carryingdrum F is secured to the upper end of av vertical shaft 42 having a wormwheel 43 secured to the lower end thereof and meshing with a worm 44shown in Figure 2 as being secured to a horizontal shaft 4| extendin forsubstantially the full length of the machine. The shaft 45 is supportedat Spaced points along the length thereof in suitable bearings mountedon the carriage 4|, and the end of this ,shaft opposite the end uponwhich the worm away from the optical unit G. Upon reference to Figure 2,it will be noted that the bracket portion 50 is bifurcated and thefurcations ii are journalled on the shaft 44 at opposite sides of theworm 44. It follows from the above that the record carrying drum F maybe adjusted relative to the optical unit G and, in the present instance,is secured in its proper position by means of suitableset screws 5!shown in Figure, 5 as being positioned to hold the drum 1'' fromswinging movement about the shaft "after they desired adjustment isattained.

Referring now to Figure 3, it will be noted that each ofthe articles ofglassware A issupported in an inverted position upon a revoluble disc 53of flexible material and the latter, in turn, is secured to a hub 54having a barrel portion 55 lower end of each sleeve 49' is also providedwith furcations 5| journalled on the drive shaft 45 on opposite sides ofa worm 56 identical to the worm 44 and adapted to mesh with a worm wheel51 secured to the lower end ofthe barrel portion 55. Each of the worms56 is secured to the shaft so that rotation of the latter eflectsarotation of the glass tumblers, as well as the record carrying drum F.In the present instance, the

record carrying drum F and the glass tumblersspective tools B by meansof springs 58 havin the upper ends engaged by adjustableset'screws 59'in lugs 60 on each of the bracket portions and having the lower endsengaging projections 50 on the carriage 40. The lugs 60 are sopositioned on the bracket portions with respect to the axis of the shaft45 to provide for swinging movement of the glass tumblers A in adirection toward their respective tools by the springs 58.

The movement of each glass tumbler A toward its respective tool B by.the associated spring 58 is limited by means of a positioning member orfeeler Bi having a tapered forward end portion 62 engageable with therear side of the glass tumbler at a point in close proximity to thepoint of engagement of the tool B with the tumbler. The location of thefeelers ii is such that these feelers oppose the action of the springs58 and definitely .normally independently urged toward their re- I limitthe extent of movement of the tumblers A means of a control wheel 54having notches '65 in the periphery thereof adaptedtocooperate feelersrelative to the tool, but to also indicate predetermined increments ofadjustment of the feelers. v

' In accordance with the present invention, the

surface of each tumbler A is adjusted relative to the adjacent tool independence upon variations in the shape of the surface so thatsubstantially the same relationship between the tools and surfaces ofthe articles A is maintained throughout the engraving process,irrespective of variations in the contour of the surfaces. The mamier inwhich the foregoing is accomplished will perhaps be better understoodupon examining Figure 6 of the drawings, wherein two positions of adjustment of one of the glass tumblers A is illustrated. Upon referenceto Figure 6, it will be noted that as the glass tumbler A is movedupwardly by the carriage 40 from the full lineposition thereof, thefeeler 6| engages the outwardly bowed surface 69 of the tumbler andswings the tumbler in a direction against the action of the spring 58.In'performing this function, the relative positions of the tool B andportion 89 of the surface is changed to such an extent that the depth ofthe cut of the tool B would become less if some provision were not madeto compensate for this change. However, the present inventioncompensates for this variation by effecting a movement of the carriage48 in the direction of the arrow 10 on the horizontal ways ll, shown inFigure 4 as mounted on the top of a second vertically movable carriage12-. As the glass tumbler moves in the direction of the-arrow 18, thetumbler, in effect, fulcrums about the point of engagement of the feeler6| with the surface 69 of the tumbler in a corresponding direction. As aresult, the surface of the tumbler immediately adjacent the cuttingportion of the tool B is moved toward the tool and the extent of thismovement is accurately determined to maintain the original selectedrelationship between the tool B and surface of the tumbler.

When the tumbler A has assumed the dotted line position shown in Figure6, the feeler 6| allows the tumbler A to swing in a direction toward thetool the extent determined by the curvature of the surface 13. As aconsequence, the carriage 40 is moved relative to the carriage I2 in thedirection of the arrow I4 with the result that the glass tumbler Afulcrums about the free end of the feeler 6| in a direction against theaction of the spring 58 until the surface 13 assumes its pre-selectedrelationship with reference to the tool B. The foregoing action of theglass tumbler A in Figure 6 is, of course, true of all of the tumblersmounted on the carriage 40.

It will be remembered that reference has been made above to the factthat the record carrying drum F is supported on the carriage 48 in amanner to move as a unit therewith. It follows, therefore, that someprovision must be made to permit horizontal movement of the drum F bythe carriage 48 without interference by the optical system and withoutchanging the relationship between the latter and record. This isaccomplished in the present instance by mounting the optical system on aplate P supported on the machine frame adjacent the carriage forhorizontal sliding movement 'as a unit with the carriage 40. As shown inFigure 5, a roller Q is mounted on the optical unit G in a position toengage the record carrying drum F and this roller is held intoengagement with the adiacent surface of the drum by a spring R normallyurging the plate P in a direction toward the drum F. As a result, theoptical system G follows the carriage 40' throughout its horizontaltravel and the focal distance is maintained the same irrespective ofsaid horizontal movement. This is desirable in that it insures uniformoperation of the light sensitive cells and thereby insures moresatisfactory results.

' Control means for horizontal carriage 40 In the present instance,movement of the car- .15 which may either be aglass tumbler, or areplica of the latter. In any event, the templet corresponds exactly inshape and size to the glass tumblers A and is mounted in exactly thesame manner as the glass tumblers A. Inother words, the templet I5 isrotated at the same speed as the glass tumbler A by the shaft 45 and iscapable of swinging movement about the axis of the shaft 45. A springidentical to the springs 58 is provided for urging the templet I5 intoabutting engagement with a feeler 16 identical to the feelers GI andadapted to engage the adjacent surface of the templet 15 at a pointcorrespondingto the point of engagement of the feelers 8| with the glasstumblers A.

with a three-phase alternating current motor 18 and operates a-relay 80to reverse'the direction of rotation of the motor I8 in response tomovement of the spring finger 18 by the surface of the templet 15. Theswitch is of a type which is very sensitive to movement of the springfinger 18 so that a very slight displacement of this finger by theadjacent surface of the templet in one direc;

tion efl'ects rotation of the motor 19 in one direction and a slightmovement of the spring finger in the opposite direction reverses themotor 19.

The motor 19 operates through suitable reduction gearing, shown inFigure 3, to reciprocate the carriage 48 on the carriage l2 and, as aconsequence, the relationship between the surface of the glass tumblersA and their respective tools B is varied in dependence upon changes inthe contour of the glass tumblersto maintain apre-se-. lectedrelationship, irrespective of the shape of the tumblers.

Upon reference to Figures 1 and 3, it will be worm wheel 81 is shown inFigure 3 as being'secured to an internally threaded sleeve 88 having theopposite ends iournalled in beafings 88 relative to the carriage I2. Itwill, of course, be

. ing connections between the motor and sleeve are carried by thecarriage 49 for movement there- -toan intermediate shaft II5 mounted inthe understood that the motor 19, sleeve 88, and drivwith as a unit.

Provision is made herein for initially adjusting the position ofthe'carriage 99 relative to the carriage 12 by manually manipulating thescrewshaft 99 relative to the sleeve 98. As shown in Figure 3, theforward end of thescrew shaft 99 extends. beyond the front side of thecarriage i2 and is rotatably supported in a bearing 9| fixed to thefront side of the carriage I2. A handle 92 is secured to the screw shaft99 beyond the bearing 9! to: provide for rotating the screw shaftrelative to the sleeve 89' and thereby effect a sliding movement of thecarriage 99 in one direction or the other, depending upon the directionof rotation of the shaft 99. It will, of course, be understood that someprovision must be made for normally holding the shaft 99 againstrotation,

and thisis accomplished by a friction clutch as comprising a pluralityof pins 94 mounted in the hub of the handle 92 for sliding movement in adirection parallel to the axis of the screw shaft 99. The ends of thepins project beyond opposite faces of the hub on the handle 92 andfrictionally engage suitable wear plates 95 freely slidably mounted onthe screw' shaft 99. The rear plate 95 frictionally engages the frontside of the housing for the bearing 9I and the front plate 95 is engagedby a manually operated control element 98 threaded on the extremeforward end of the shaft 99. The arrangement is such that when thecontrol 99 is tightened onthe shaft 99, the latter is frictionally heldagainst rotation by the clutch 93 and when the control 96 is loosened,the friction is decreased to such an extent as to permit manuallyoperating theshaft 99 by the control 92. With this construction, thecarriage 49 may be manually adjusted to obtain a predetermined initialsetting of the glass tumblers A relative to their respective tools B. Ofcourse, movement of the carriage 49 also effects a correspondingadjustment of the templet 15 relative to the feeler I9 and switch 11.

Operating mechanism for carriage 72 The carriage I2 is supported onvertically extending ways 91 formed in the machine frame and is adaptedto be fed upwardly at a relatively slow rate of speed by means of anelectric motor 98 through a variable speed transmission 99. Of

course, movement of the carriage 12 upwardly P effects a correspondingmovement of the carriage 49 and of the parts mounted on the lattercarriage. In detail, the lower end of the carriage I2 is provided with anut I99 threaded upon a vertinoted that the drive shaft I95 of the motor98 is provided with a worm I98 adapted to mesh with a worm wheel I9Ilocated in the transmission housing I98 and secured to one end ofa'shaft ,I99. The shaft I99 is suitably journalled in the housing I98and the opposite end thereof is connectedto a countershaft II9 by meansof a gear III secured to the shaft I99 and meshing with a,

gear II2 secured to the shaft H9. The countershait II9 has a gear II3secured thereto adapted .to mesh with a relatively large gearIll-secured housing I98 for sliding movement in opposite directions.When the gear. I I4 is in mesh with the gear I I3, the same also mesheswith a pinion I I6 secured to the power take-off shaft I94, with theresult that the vertical screw IN is rotated by the power take-01f shaftI94 in a direction relative to the nut I99 to move the carriage I2upwardly at a relatively slow speed.

When the gear H4 is moved by the shaft H5 from the position thereofshown in Figure '7 in the direction of the arrow, it meshes with asecond pinion III on the power take-off shaft and with a pinion II8secured to a second countershaft I I9 supported in the case I98 in axialalignment with the countershaft H9. The countershaft I I9 has a spiralgear I29 secured thereto in intermeshing relation with a spiral gear I2Isecured to the'motor shaft, and the ratio is such that the countershaftI I9 is rotated by the motor 98 at a faster speed than the countershaft.II9. Also, it willbe apparent upon viewing Figure 7 that thecountershaft H9 is rotated in a direction opposite the direction ofrotation of the countershaft II9, with the result that the screw IN isrotated relative to the nut I99 in a direction to .move the carriagedownwardly at a relatively fast rate. I

In the foregoing description, reference was made to the fact that'theglass tumblers are supported in their inverted position on resilientdiscs, designated in Figure 3 by the reference character 53, 'Thetemplet I5 is supported in an identical manner and provision is madeherevin for not only accurately centering.,.the glass tumblers andtemplet on their respective discs, but to also--efiectively clamp thesame to the discs. Upon reference to Figure 3, it will be noted that acentering device I25 is secured on the upper end of each sleeve 55 abovethe disc 53. As shown in Figure 10, the centering device comprises aplurality of rubber bumpers I26 spaced from each other circumferentiallyof the device and adapted to frictionally engage the inner surface ofthe article adjacentthe open end of the latter. Each of thebur'npers I26is carried by a suitable sleeve I21 adjustable relative to the deviceI25 to vary the positions of the bumpers and held in place by frictionalengagement with the device I25.

The glass tumblers, as ,well as the templet I5, are efiectivelyclamped'against the resilient discs 53; by suction. As shown in Figure1, a vacuum line I28 is mounted on the carriage 49 and communicates withthe interior of the templet I5 and each of the glass tumblers throughthe medium of a conduit,l29. It will, of course, be understood that thevacuum line extends for sub: stantially the full length of the carriage49 and is connected to a suitable vacuum. pump. (not.

shown).

In Figure 11 of the drawings, I have shown a glass article ofsubstantially different contour than the tumblers A previouslydiscussed. The glass article in Figure 11 has a surface I39 which issubstantially semi-spherical in shape and when engraving articles ofthis general contour, it may be desirable to feed the carriage 49 andcontrol the vertical movement of the carriage 12 by the switch 11. Thismay be accomplished in a relaswitch in the circuit for the motor 98 andoperating the reversing switch by the templet oper ated switch I! in thesame manner defined in'the foregoing. description. When resorting tothis -70 tively simple manner by connecting a reversing particularconstruction, the motor 19 for the transverse carriage is, of course,operated to feed the carriage MI at a constant rate toward the tool andis stopped in any suitable manner at the end of the feed. The motor!!!is then reversed to return the carriage 40 to its initial startingposition in readiness for another cycle of operation. It follows'fromthe above that the principle of operation of the embodiment shown inFigurev 11 is the same as the one described above, with the exceptionthat the articles are fed relative to the tools by the carriage 40 andthe carriage I2 is operated in dependence upon changes in contour of thesurface I30 to maintain a predetermined relationship between thissurface and the adjacent tool throughout the engraving operation,irrespective of changes in shape of the surface.

What I claim as my invention is: 1. In apparatus for producing a designin the surface of an article, means supportingan article having asurface on which a record is to be reproduced, a tool supported oppositesaid surface of the article, means controlled by the record forrelatively moving the article supporting means and tool toward and awayfrom each other, means for, relativelymoving the article 2. In apparatusfor producing a design in the surface of an article, means supporting amember carrying the 'design to be reproduced on the surface of thearticle, an optical system scanning the design and including a' lightsensitive cell controlled by the design, a tool supported'opposite thesurface of the article, means controlled by the light sensitive cell forrelatively moving the tool and article toward and away from each other,and means operated in dependence upon changes in shape of the surface ofthe article to adjust the relative positions of said article and tool tomaintain the same relationship between the surface of the article andtool'irrespective of variations in the surface contour of the surface.

3. In apparatus for producing a design in the surface of an article,means supporting an article having a surface on which a record is to bereproduced, a tool supported opposite said'surface 'of the article,means controlled by the design for relatively moving the articlesupporting said of the article, and meanscontrolled by the surface ofsaid templet for. controlling the operation of the last named means.

4.'In apparatus for producing a design in the surface of an article,means supporting an article having a surface on which a record is to bereproduced, a tool supported opposite said surface '9 from the article,means controlled by the design of the article for movement toward andaway for operating said tool, and means responsive to variations incontour of the article to move the article supporting means relative tothe tool to maintain the same relationship between the tool and surfaceaforesaid of the article irrespective of changes in the contour of the.,urface.-

5. In apparatus for producing a design in the surface of an article,means supporting a member carrying the design to be reproduced on thesurface of the article, an optical system scanning the design andincluding a light sensitive cell controlled by the design, a toolsupported opposite the surface of the article for movement toward andaway from said surface, means controlled by the light sensitive cell foroperating the tool, means for moving the design carrying member relativeto the optical system to cause the latter to traverse the design and foralso correspondingly moving the article relative to the tool, a templetmovable as a unit with the article and having a surface corresponding incontour to the surface aforesaid of the article, and means controlled bythe surface of the templet forrelatively adjusting the tool and articlein accordance with changes in shape of the latter to maintain the samerelationship between the tool and adjacent surface of the articleirrespective of variations in contour of the latter.' V

6. In apparatus for producing a design in the surface of an article, amember carrying the record to be reproduced on the surface of thearticle, a tool supported opposite said surface of the article,means-controlled by the record for relatively moving the article andtool toward and away from each other, means for relatively moving therecord carrying member and aforesaid means to cause the record to betraversed by the latter and for effecting corresponding relativemovement between the article and tool, a templet having a surfacecontour corresponding to the contour of the surface aforesaid of thearticle, an element eng'ageablewith said surface and movable by thelatter in accordance with variations in contour of the surface, saidtemplet and element also being correspondingly relatively movable toeffect said movement of the element in accordance with variations incontour of the surface of the templet, and means controlled by theelement for relatively adjusting the positions of the tool and adjacentsurface of the article to maintain the latter in the same relationshipirrespective of variations in the contour of said surface.

'7. In apparatus for producing a design in the surface of an article, amember carrying the record to be reproduced on the surface of thearticle, a tool supported opposite said surface of the article, meanscontrolled by the record for relatively moving the article and tooltoward and away from each other, means for relatively moving the recordcarrying member and aforesaid means to cause the record to be traversedby the latter and for effecting corresponding relative movement betweenthe article and tool, a positioning element engageable with the-surfaceof the article at a point in close proximity to the point of engagementof the tool with the surface, and means for adjusting the article aboutthe point of engagement of the element with said surface.

8. In apparatus 'for producing a design in the surface of an article, amember carrying the record to be reproduced on the surface of thearticle, a tool supported opposite said surface of the article, meanscontrolled by the record for relatively moving the article and, tooltoward and away from each other, means for relatively moving the recordcarrying member and aforesaid means to cause the-record to be traversedby the latter and for effecting corresponding relative cle irrespectiveof variations in contour of said surface. I

9. In apparatus for producing a design in the surface of an article,means supporting a member carrying the design to be reproduced on thesurface of the article, an optical system scanning 15 the design andincluding a light sensitive cell controlled by the design, a toolsupported opposite the surface of the article for movement to-- I wardand awayfrom said surface, means controlled by the light sensitive cellfor operating the tool, means for moving the design carrying memberrelative to the optical system to cause the latter to traverse thedesign and for also correspondingly moving the article relative to thetool, means supporting the article for swinging movement toward and awayfrom the tool, means normally urging the article toward the tool, a

- positioning element engageable with the surface Lof the article at apoint adjacent the point of engagement of the tool with said surface,and means responsive to variations in contour of the surface forswinging the article in opposite directions about the point ofengagement of the positioning element with the article to maintain thesame relationship between the surface of the article and toolirrespective of variations in. contour of said surface.

= 10. In apparatus for producing a design in'the surface of an article,a member carrying the record to be reproduced on the surface of thearticle, a tool supported opposite said surface of the article, meanscontrolled by the record for relatively moving the article and tooltoward and away from each other, means for relatively moving the recordcarrying member and aforesaid means to cause the record to be traversedby the latter and for effecting corresponding relative movementsupporting the templet for swingingmovement' toward and away from saidelement, means normally urging the templet into engagement with theelement, means occupying the same position relative to the templetsurface as the tool occupies relative to the article surface andoperated by the templet surface in accordance with changes in contour ofthe latter, .and means controlled by the last namedmeans for moving thearticle in opposite directions relative to the tool about a point on thesurface of the article corresponding to the point of engagement of saidelement with the templet surface.

11. In'apparatus for producing a design in the surface of an article, amember carrying the record to be reproduced on the surfaceof thearticle, a, tool supported opposite said surface of the article, meanscontrolled by the record for relatively moving the article and tooltoward and away from each other, means for relatively moving the recordcarrying member and aforesaid means to cause the record to be traversedbythe latter and for effecting corresponding relative movement betweenthe article and tool, a templet having a surface contour correspondingtothe contour of the surface aforesaid of the article, a positioningelement engageable withthe surface of the article at a point in closeproximity to the point of engagement of the tool with the articlesurface, a second positioning element engageable with the templetsurface-at a point corresponding to the point of engagement of the firstelement with the article surface, means mounting the templet and.article for swinging movement in opposite directions toward and awayfrom their respective positioning elements, means normally urging thetemplet and article into engagement withtheir respective positioningelements, means for swinging both the templet and article in oppositedirections about the points of engagement of the positioning elementstherewith, and means operated by the surface of the templet forcontrolling the operation of the last named means.

12. In apparatus for producing a design in the surface of an article, amember carrying the record to be reproduced on the surface of thearticle, a tool supported opposite said surface of the article, meanscontrolled by the record for relatively moving the articleand tooltoward and away from each other, means for relatively moving the recordcarrying member and aforesaid means to cause the record to be traversedby the latter and for effecting corresponding relative movement betweenthe article and tool, means supporting the article for swinging movementtoward and away from the tool, a positioning element engageable with thesurface of the article adjacent the tool to limit swinging movement ofthe article toward the tool, 'means for relatively moving the articleand positioning element in opposite directions relative to the tool tocause the article to fulcrum about said element and change the positionof the surface of the article "relative to the tool, and. meansresponsive to variations in contour 'of the article to control theoperation of the last named means to maintain the same relationshipbetween the surface of the articleand tool irrespective of changes incontour of said surface.

13. In apparatus for producing a design in the surface of an article,means supporting -a member carrying the design to be reproduced on thesurface of the article, an optical system scanning the design andincluding a light sensitivecell controlled by the design, a toolsupported opposite the surface of the article, means controlled by thelight sensitive cell for relatively moving the tool and article towardand away from each other, means'for relatively moving the optical systemand design carrying member to cause the design to be traversed'by theoptical system and for also correspondingly relatively moving thearticle and tool, a carriage supporting the article for swingingmovement in directions toward and away from the tool, a

positioning element engageable with the surface of the article adjacentthe tool to limit swinging movement of the article toward the tool,means for moving the carriage toward and away from the positioningelement to cause the. article to fulcrum about the point of engagementof the positioning element with the surface thereof, and

means responsive to variations in contour of the article to control theoperation of the last named means to maintain the same relationship be--alight sensitive cell controlled by the record,

14. In apparatus for producing a design in the surfaces of a pluralityof articles, means for supporting the articles in spaced relation toeach other, a member carrying the record to be reproduced-on thesurfaces of the articles, a tool supported opposite each article formovement toward and away from the surface of the latter, meanscontrolled by the record for moving the tools as a unit toward and awayfrom the articles, means for relatively moving the record carryingmember and second named means to cause the record to be traversed bythelatter means and for also effecting relative movement of the articlesand tools, means for relatively moving the articles and tools toward andaway from each other to maintain the same relationship between the toolsand adjacent surfaces of the articles irrespective of changes in contourof said surfaces, and means operated in dependence upon-changes in thecontour of said surfaces for controlling the operation of the lastmentioned means.

15. In apparatus for producing a design in the surfaces of a pluralityof articles, means for supporting the articles in spaced relation toeach other, a member carrying the record to be reproduced on thesurfaces of the articles, a tool supported opposite each article formovement toward. and away from the surface of the latter, meanscontrolled by the record for moving the tools as a unit toward and awayfrom the articles, means for relatively moving the record carryingmember and second named means to cause the record to be traversed by thelatter means and for also eifecting relative movement of the articlesand tools, means supporting the articles for swinging movementindependently of each other toward and away from the tools, apositioning element engageable with the surface of each article adjacentthe points of engagement of the tools with the surfaces, means formoving the articles as a unit in opposite directions relative to thetools to cause the articles to fulcrum about their respectivepositioning elements and change the positions of the article surfacesrelative to the tools, and means responsive to variations in contour ofthe article surfaces to control the operation of the last named means.

16. In apparatus for producing a design in th surfaces of a plurality ofarticles, means for supporting the articles in spaced relation to eachother, a member carrying the record to be reproduced on the surfaces ofthe articles, a tool supported opposite .each article for movementtoward and away from the surface of the latter, an optical unit forscanning the record including means controlled by the light sensitivecell for moving the tools as a unit into and out of enmaintain the samerelationship between the sur- 7 faces of the articles and toolsirrespective of variations in surface contour of the articles.

17, In apparatus for producing a design in the surfaces of a pluralityof articles, means for supporting the articles in spaced relation toeach other, a member carrying the record to be reproduced on thesurfaces of the articles, a tool supported. opposite each article formovement toward and away from the surface of the latter, an optical unitfor scanning the record including a light sensitive cell controlled bythe record, means controlled by the light sensitive cell for moving thetools as a unit into and out of engagement with the surfaces of thearticles, means for relatively moving the record carrying member andoptical unit indirections to cause the record to be traversed by theoptical unit and for also effecting corresponding relative movement ofthe articles" and tools, a carriage supporting the articles for swingingmovement .in dependently of one another toward and away from the tools,a positioning element engageable with the surface of each article at apoint adjacent the point of engagement of the tools with said articles,means for moving the carriage toward and away from the positioningelements to cause the articles to fulcrum about the points of engagementof the positioning elements with the articles, and means responsive tovariations in the surface contour of the articles for controlling thelast named means.

18. In apparatus for producing a design in the surfaces of a pluralityof articles, means for supporting the articles in spaced relation toeach record to be traversed by the latter means and for also effectingrelative movement of the ar-.

ticles and tools, a templet having a surface contour corresponding tothe contour of said articles, an element engageable with the templetsurface and supported for movement in directions toward and away fromthe templet, said templet and element being relatively movable inaccordance with the traversing relative movement aforesaid ofthearticles and tools whereby said element moves in opposite directionsin response to changes in contour of the templet surface, and

means controlled by the element for relatively moving the articles andtools as a unit in accordance with changes in contour of the articles tomaintain the same relationship between the articles and toolsirrespective of changes in the 'surfa'c'contour of the articles.

19. In apparatus for producing a design in the surfaces of a pluralityof" articles, means for supporting the articles in spaced relation toeach other, a member carrying the record to be reproduced on thesurfaces of the articles, a tool supported opposite each article formovement toward and away from the surface of the latter, an optical unitfor scanning the record including a light sensitive cell controlled bythe record,

means controlled by the light sensitive cell for moving the tools as aunit into and out of engagement with the surfaces of the articles, acarriage supporting the articles for swinging movement independently ofone another toward and away from'the tools, a positioningelementengageable with the surface of each article at a point adjacent thepoint of engagement of the tools with said articles, means for movingthe carriage in directions toward and away from the positioningelements, a second carriage supporting the first carriage and movable inopposite directions transverse to the path of movement of by the recordfor relatively moving the tools and said first carriage, and meanscontrolling the movement of one of the carriagesin accordance withvariations in the surface contour of said articles. to maintain the samerelationship between said articles and tools irrespective of changes inthe contours of said articles.

20. In apparatus for producing a design in the surface of an article,means supporting a mem--- ber carrying the design to be reproduced onthe surface of the article, an optical system scanning the design andincluding a light sensitive cell controlled by the design, a toolsupported opposite the surface of the article, means controlled by thelight sensitive cell for relatively moving the tool and article towardand away from each other, means for relatively moving the optical systemand record carrying member to cause the record to be traversed by theoptical system and for. also correspondingly relatively moving thearticle and tool, a carriage supporting the article for swingingmovement in directions toward and away from the tool, a positioningelement engageable with the surface of the article adjacent the tool tolimit swinging movement of the article toward the tool, means formovingthe carriage toward and away from the tool, a second carriage supportingthe carriage aforesaid and movable in opposite directions transverse tothe path of travel of the first carriage, and means responsive tochanges in the surface contour of the article to control the operationof one of said carriages to maintain the tool and adjacent sur face ofthe article in the same relative positions irrespective of variations inthe contour of said surface.

21. In apparatus for producing a design in the surfaces of a pluralityof articles, means for supporting the articles in spaced relation toeach other, a member carrying the record to be reproduced on thesurfaces of the articles, a tool supported opposite each article formovement toward and away from thesurface of the latter, an optical unitfor scanning the record including a light sensitive cell controlled bythe record, means controlled by the light sensitive cell for moving thetools as a unit into and out of engagement with the surfaces of thearticles, means for relatively moving the record carrying member andoptical unit in directions to cause the record to be traversed by theoptical unit and for also effecting corresponding relative movement ofthe articles and tools, a carriage supporting the articles for swingingmovement independently of one another toward and away from the tools, apositioning element engageable with the surface of elements therewith,and means operated by the surface of the templet in accordance withvariations in the contour thereof to control the operation of thelast-named means.

22. -In apparatus for producing a design in the surfaces of a pluralityof articles, means for supporting the articles in spaced relation toeach other, a member carrying the record to be reproduced on thesurfaces of the articles, a tool supported opposite each article, meanscontrolled articles toward and away from each other,fand

of the surfaces aforesaid of the articles for relatively adjusting thetools and articles to maintain the same relationship between the toolsand adjacent surface of the articles, irrespective of variations in thecontour of said surfaces.

, 23. In apparatus for producing a design in the surface of an article,means supporting an article having a surface on which a record is to bereproduced, a tool supported opposite said; surface of the article,means controlled by the record for relatively moving the ar ticlesupporting means and tool toward and away from each other, electricallyoperated means for relatively adjusting the article and tool to maintainthe same relationship between the tool and adjacent surface of thearticle irrespective of variations in the contour of said surface, and aswitchcontrolling the operation of the last named means and operated independence upon variations in relatively moving the article and tooltoward and away from each other, means forrelatively moving the recordcarrying member and aforesaid means to cause the record to be traversedby the latter and for effecting corresponding relative movement betweenthe article and tool, a positioning element engageable with the surfaceof the article at a point in close proximity to the point of engagementof the toolwith the surface, and means responsive-to variations incontour of the surface of the article for relatively moving the articleand positioning element to effect an adjustment of the article relativeto the tool about the point of engagement of the element with thesurface of the article and thereby maintain the same relationshipbetween the tool and adjacent surface of the. article irrespective ofvariations in contour of the latter.

25. In apparatus for producing a design in the surface of an article, amember carrying the record to be reproduced on the surface of. thearticle, a tool supported opposite said surface of the article, meanscontrolled by the record for relatively moving the article and tooltoward and away from each other, means for relatively moving the record.carrying member and aforesaid means to cause the record to be traversedby the latter and' for effecting corresponding relative movement betweenthe article and tool, a positioning element engageable with the surfaceof the article at a point in close proximity to the point of engagementof the tool with the surface, electrically operated means for relativelymoving the article and positioning element in opposite directions toeffect adjustment of the article about the point of engagement of theelement with the surface of the article, and a reversing switchresponsive to variations in the contour of saidsurface of the articlefor controlling the operation of the last named means.

26. In apparatus for producing a design in the surface of an article,means supporting a member carrying the design to be reproduced on thesurface of the article, an optical system scanning the design andincluding a light sensitive cell controlled by the design, atool'supported opposite the surface of the article, means conopticalsystem and design carrying member to cause the design to' betraversed'by the optical system and for also correspondingly relativelymoving the article and tool, a carriage supporting the article forrocking movement, a posiand for also correspondingly relatively movingtioning element engageable with the surface of the article adjacent thetool to limit rocking' movement of the article in a direction toward thetool, electrically operated means for moving the carriage toward andaway from the positioning element to cause the article to fulcrun'rabout the point of engagement of the positioning'element with thesurface thereof, and a neversing, switch controlling the operation ofthe last named means and operated .in dependence upon changes in contourof the surface'of the article to maintain the same-relationship betweenI mean;

the design a d including a light sensitive cell controlledby the design,a tool supported opposite the surface of the article, means controlled[by the light sensitive cell for relatively moving the tool and articletoward and away from each other, means for relatively moving'the opticalsystem and design carrying memberto cause the design to be traversed bythe optical system the article and tool, a carriage supporting thearticle for swinging movement in directions toward and awayfrom thetool, a positioning element engageable with the surface of the articleadjacent the tool to limit swinging movement of the article toward thetool, means for moving the carriage toward and away from the posithearticle, and means operated by the surface of the templet forcontrolling the operation of said carriage moving means.

EVERE'I'I J. COOK.

